Cognomen Erlacher (Erlacher 
) , globally, is quite a rare last name. The surname Erlacher is habitual in Austria, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Italy, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Austria, Germany, and Brazil. Very seldom, Erlacher is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Erlacher | Brazil, Italy, United States, Germany, Austria |
| sebastian erlacher DE (b. 1609) |
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| johann jakob erlacher (1764-1828), CH (b. 1764) |
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| karl erlacher (b. 1858) |
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| joseph erlacher German sculptor and painter, DE (b. 1871) |
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| philipp erlacher Austrian university teacher (1886-1980), AT (b. 1886) |
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| anton erlacher German sculptor, DE (b. 1909) |
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roberto erlacher Olympic alpine skier, IT (b. 1963) |
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| silvestro erlacher IT (b. 1910) |
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| josef erlacher Italian para-alpine skier, IT (b. 1965) |
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| gisela erlacher (b. 1956) |
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| georg erlacher AT (b. 1959) |
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| dietmar erlacher AT (b. 1959) |
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| silvana erlacher IT (b. 1967) |
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| helmut erlacher researcher (ORCID 0000-0003-4404-8308) |
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| matthias david erlacher researcher |
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